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vW. C. BAKER.

BRAKEMECHANISM.

APPLICATION FILED JULYZZ, |918.

Patented July 1, W19.

WAL TEE LTEAKE'J? all lill

parrain schans 'ramener onction...

"WLTER BAKER., OF LAKEWOGID, 01H16), ASSIGNOR T0 THE STANDARD PARTS COMEANY, fill? GLEVELANIB, 0HIO, A CORPORATION Ol OUT lEllllalKE lYIECHANISll/L application tiled July 22, 1318.

To all whom t may conca/rn:

Be it known that l, WALTER@ llaman, a citizen of the United States, and a resident of Lakewood, county of Cuyahoga, State olf Ohio, have invented certain new and useful., improvements in Brake lllechanism, oi which thefollowing is a specication.

This invention relates to brake mechanism for vehicles Vand more particularly to brake mechanism for usc in connection with automobiles provided with the Hotchkiss type ol drive, wherein the torque in the driving axle and the drivingr thrusts are taken through the springs, the radius rod and `torque rod usually employed in other types of drive, being omitted. il have 'found that the drivngand braking torque in the drivingaxle of an automobile equipped with the llotchkiss type of drive, cause the axle to oscillate about an aXis removed from the axis of the axle andthe road Wheels. ln vehicles. as.

`heretofore equipped with the Hotchkiss type lbrakes are applied.

lt is the general purpose and object ot this invention to so connect and arrange the brake operating parts, with reference to the rear or driving axle, that the up and down movements of the aule relative to the body and the oscillation of the axle, will have practically no effect on the brake mechanism.

lf accomplish this result by arranging; the parte lot the brake mechanism according to the principles hereinafter set forth, and 'illustrated in the accompanying drawing, 'which is a somewhat diagrammatic longitudinal section of the rear portion of .a vehicle.

ln the drawing, l represents one of the side frames of an automobile and 2, a driv-v ing axle, which includes a housing 3. at spring fl, of which there `will be ay pair, in accordance with the usual practice, is conneeted with the housing' 3 by means of clips 5 and with the .trame l by means of the driving;` bolt (l, on which the end of the signing; is 'ivoted. @ne ot the wheels is illustrated at and may be mounted on the aule il, accord Specification of Letters Patent.

Patented il uly l. l ll ttl..

Serial No. 246,050.

The shaft 8 is rot: tably mounted on one or more brackets 9, secured to the axle housing; ilf and is actuated by means of the usual lever arm Il() which will bc connected with the brake lever or pedal on the body oi the vcv hicle. r

lt will be noted that in the case of a vehicle having the driving),` axle coimected with the frame solely through thc, spriilgs, as illustrated in the drawing, the axle is not only free to move up and down relatively to thc body, but the usual drivingr and braking' torqucs, will oscillate the axle, on account ol' the flexibility of the springs, which are the onlj7 members that resist the oscillation. l have discovered that in the case of a vchiclc equipped substantially as shown in the drawing', the axle as a Whole rotates under the influence of the driviinir and brakingr toi-ques about an axis parallel with the axis of thc axle and which may be approximately at the point l1, although the exact location of this axis will vary with the shape, lengtl'i and flexibility ot' the springs. l have accord ingly located-at the point 11, the pivot 'pin at the outer end ot' the arm l() and by so loeating this pivot pin, the turningf movements of the axle, due to torque therein, produce practically no movements of the center on the arm l() and hence there is no tendency to either set-up or release the brakes.

llxtcnding from thc arm 10, is a rod l2 pivotally connected at 13 to one end of an equalizer '1.4 which, has its other end com nei-ted at 19 with the arm l5 secured on a shaftlfl. It will be observed that the spring l acts substantiallv'as a 'radius rod and that the axle 2 swings in a curved path which approximates an are about an axis-near thc center of the bolt 6, when the axle moves up and down rela-tively to the body. rThe shaft 1G and the arm 15 are carried by the body -frame l and. therefore, in order .that the axle movements mayl not affect the brake arm 10, it is important that the center 17 of the equalizer 14 be located so that the up and down movements of the axle will carry the point 11 in a path which is substantially anarc about the pivot 17. l have discovered that by locating the points `ll and 1'? in accordance. 'with the 'foregoing' principles,

the usual movements of the body and axle will have practically no influence 0n the action of the brakes. The brake for the wheel at the opposite end of the axle will be actuated by a rod correspondingr to the rod 12, but having its forward end connected with an arm, on shaft 16, ot' the saine length as arm 15 and whose lower center is in alinement with the point 19.

In actuating` the brakes the shaft 16 will be rocked by any suitable mechanism from the usual pedal or hand lever on the body of the vehicle, and for this purpose I have illustrated the rod 18 which is connected with the center 17 of the equalizer 14. These features, however, may be arranged in any desired manner and o'rm no part of the present invention, such parts bein entirely supported on the body are not :ilected in any way bv the mlvements of the axle.

A further advantage resultingr from the arrangement ot' the brake lever in accordance with the principles above described, is that the movements or' the vehicle do not produce any movements in the brake pedal or hand lever, and when the brakes are set, and the vehicle is traveling over a rough road there will be no tendency to either set up the brakes, release them, or to put undue strain on the connections.

H avinp; thus described my invention, what i I claim 1s M 1. In a motor vehicle, the combination of the frame ot' the vehicle, a driving axle, a driving' wheel on said axle, a brake t'or said wheel having an operating arm, a spring connection between said axle and frame permitting the axle to oscillate under the intluence of driving and braking torque,

brakeoperating means carried by said frame, and a rod connected at one end to said means at a point substantially coincident with the axis about which the said axle oscillates under the influence of driv` ing and braking torque and at its opposite end to the second mentioned arm at a point substantially coincident with the axis about which said axle swings in its movements relative to the frame.

2. In a motor vehicle, the combination of the frame of the vehicle, a driving axle, a driving wheel on said axle, a spring operatively connecting said axle and said frame and permitting the axle to oscillate under the influence of driving and braking torque, a brake for said wheel, an arm connected with said brake, and operating means connected with said arm at a point substantially coincident with the axis about.v which the said axle oscillates under the influence of the driving and braking tonque.

3. In a motor vehicle, the combination of the frame of the vehicle, a driving axle, a

driving wheel on said axle, a :springopera-V tively connecting said axle and frame and permitting the axle to oscillate under the influence of drivingr and braking torque. a brake for said wheel, an arm for operating said brake carried by the axle, brake operatingr means on said frame, and a rod connect` ed at one end with said arm and at the other end with said means at a point substantialhv coincident with the axis about which said axle swings in its movements relative to the frame.

In testimony whereof I-aix my signature.

'WALTER G. BAKERA 

